Audio enhancing and amplifying system for cell phone protective case

Abstract

A protective case discloses an electronic device protective casing, comprising an outer wall of back cover of outer protective layer and an inner wall of the back cover of the outer protective layer. The protective case further comprises an inner flexible layer corresponds to the inner wall of the back cover of the outer protective layer. The back cover comprises an amplifying chamber. Furthermore, the outer layer of the protective case can be made with hard material such as polycarbonate (PC) and the inner flexible layer can be made with soft material such as thermoplastic polyurethane (TPU), so that the protective case is able to protect the electronic device from drops and shocks. Finally, the sound emitted from the speaker of the electronic device comes through the amplifying chamber on the back cover of the protective case with an enhanced, amplified, better quality and wider range sound.

What is claimed is: 
     
         1 . An electronic device protective case, comprising a front cover and a rear cover of outer layer, and an inner flexible layer. The rear cover of outer layer further comprises an inner wall and an outer wall. And the inner flexible layer is enclosed by the inner wall of the outer layer and the front cover of the outer layer. And the rear cover of the outer layer further comprises an audio enhancing and amplifying system. 
     
     
         2 . The case of  claim 1 , wherein the audio enhancing and amplifying system comprises an amplifying chamber on the inner wall. The amplifying chamber further comprises multiple amplifying openings and audio guide channel. The starting point of the audio guide channel is located at the speaker of the electronic device and the end point of the audio guide channel is located at the amplifying chamber. And the inner flexible layer comprises at least one opening for audio, which corresponds to the speaker of the electronic device; and the opening for audio corresponds to the starting point of the audio guide channel. 
     
     
         3 . The case of  claim 2 , wherein the multiple amplifying openings are built in a fashion that the sound broadcasted though the multiple amplifying openings is emitted in different directions. 
     
     
         4 . The case of  claim 2 , wherein the multiple amplifying openings comprise rear amplifying openings and side amplifying openings. The multiple amplifying openings are vertically symmetrical to the center line of the amplifying chamber. 
     
     
         5 . The case of  claim 4 , wherein the amplifying chamber comprises at least  2  back ridges. The back ridges are vertically symmetrical to the center line of the amplifying chamber. And the back ridges further comprise multiple rear amplifying openings along the vertical lines. 
     
     
         6 . The case of  claim 5 , wherein the amplifying chamber is built at the position where a protrusion is formed on the outer wall of the back cover. 
     
     
         7 . The case of  claim 6 , wherein the position of the edge of the back cover of the outer layer is at the edge of the inner flexible layer and corresponds to the front frame. The Inner flexible layer is encased between the front frame and the back cover of the protective case's outer layer. 
     
     
         8 . The case of  claim 6 , wherein the front frame comprises transparent lens. The front frame with the transparent lens further comprises an edge corresponds to the edge of the back cover of the protective case. And the inner flexible layer is encased between the front frame with lens and the back cover of the protective case's outer layer. 
     
     
         9 . The case of  claim 6 , wherein the inner flexible layer and the back cover of the outer layer snap onto each other easily.